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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>Hello,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I’m trying to get a Cisco E20 to register to CUCM 7.1.5 but I’m not having very much success. I have it configured as a 3<sup>rd</sup> party SIP device in CM with digest credentials and I’ve added the same authentication on the E20 itself along with URI and display name. I’ve compared these setting against other 3<sup>rd</sup> party SIP devices that I’ve successfully registered (Bria) and it matches yet still no successful registration. I get the error “Call service is unavailable” with a reason of “Failed to send”. The E20 is running on firmware version 4.1.1.273710.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Thanks,<o:p></o:p></p><p class=MsoNormal>Ruben<o:p></o:p></p></div></body></html>